SGP/CO2FLX/C1 - Met stand was moved

Ameriflux program (Hank Loescher from Oregon state university) visits the site to 
intercompare his instruments with our 4m flux system.
The met stand was moved by 30 feet and consequently:
1. Soil moisture sensors were disconnected,
2. Soil temperature sensors were disconnected,
3. Soil heat plates were disconnected,
4. The true direction of the anemometer boom was 230 degrees instead of the regular 270 
degrees.

• average of two lower soil temperature sensors(mean_t_soil_lower)
• average of four upper soil moisture sensors(mean_m_soil_upper)
• Unit Vector Wind Direction(wdir)
• average of four lower soil moisture sensors(mean_m_soil_lower)
• average of two middle soil temperature sensors(mean_t_soil_middle)
• average of up to four soil heat flux sensors(mean_g_soil)
• average of two upper soil temperature sensors(mean_t_soil_upper)

SGP/CO2FLX/C1 - downwelling longwave hemispheric irradiance incorrect

Downwelling longwave radiation measurements (variable "r_down_long_hemisp") are bad due to 
a wiring issue. Users should not use the downwelling longwave hemispheric irradiance 
during this period. The downwelling shortwave and longwave radiation at CF is also available 
from the Broadband Radiometer Station (BRS).

• downwelling longwave hemispheric irradiance t_rad corrected(r_down_long_hemisp)

SGP/CO2FLX/C1 - Disturbance around site

A bulldozer used to excavate the SGP Tower anchors was right around (within 10 feet) our 
systems.

• mean co2 concentration (c)(mean_c)
• WPL corrected CO2 flux(fc_corr)

• WPL corrected CO2 flux(fc_corr)
• mean co2 concentration (c)(mean_c)

• mean co2 concentration (c)(mean_c)
• WPL corrected CO2 flux(fc_corr)

• WPL corrected CO2 flux(fc_corr)
• mean co2 concentration (c)(mean_c)

SGP/CO2FLX/C1 - Farm operation

Soil temperature, soil moisture, soil heat flux and upwelling surface radiation (long, 
short, and PAR) measurements were not valid from 20070822 to 20070907 due to farm operations.

• average of two lower soil temperature sensors(mean_t_soil_lower)
• standard error of mean_t_soil_upper note maximum of two values used in
  calculation(stderr_mean_t_soil_upper)
• photosynthetic photon flux density (PAR)(ppfd_up)
• average of four lower soil moisture sensors(mean_m_soil_lower)
• standard error of mean_t_soil_middle note maximum of two values used in
  calculation(stderr_mean_t_soil_middle)
• average of two middle soil temperature sensors(mean_t_soil_middle)
• upwelling shortwave hemispheric irradiance t_rad corrected(r_up_short_hemisp)
• standard error of mean_m_soil_upper(stderr_mean_m_soil_upper)
• average of four upper soil moisture sensors(mean_m_soil_upper)
• standard error of mean_t_soil_lower note maximum of two values used in
  calculation(stderr_mean_t_soil_lower)
• average of up to four soil heat flux sensors(mean_g_soil)
• upwelling longwave hemispheric irradiance t_rad corrected(r_up_long_hemisp)
• average of two upper soil temperature sensors(mean_t_soil_upper)
• standard error of mean_m_soil_lower(stderr_mean_m_soil_lower)
• standard error of mean_g_soil(stderr_mean_g_soil)